This alert expired on 11 July 2026 at 02:30 UTC. It is kept here as a record.
It is the 32nd strongest of the 45 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 10 at 8:41PM CDT until July 10 at 9:30PM CDT by NWS Paducah KY
An estimated 987,945 people live within 50 km of this point.
Nearby, since 15 March 2026
- May 18, 2026 · score 52 · 5.6 km
- March 15, 2026 · score 76 · 12.0 km
- March 16, 2026 · score 52 · 14.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 out of 100, at 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 48 / 100 |
| Our confidence | 80% |
| Coordinates | 38.5947, -89.9246 |
| Nearest City | O'Fallon (1 km) |
| Population Exposed | 987.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-11T01:41:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.5c905c965ef9bcc402959dac2ba32227 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Pope, IL; Saline, IL; Jersey, IL; Madison, IL; St. Clair, IL; St. Charles, MO; St. Louis, MO; St. Louis City, MO; Calhoun, IL; St. Charles, MO; St. Louis, MO and 1 more areas |
| Headline | Severe Thunderstorm Warning issued July 10 at 8:41PM CDT until July 10 at 9:30PM CDT by NWS Paducah KY |
| Expires | 2026-07-10T21:30:00-05:00 |
| SenderName | NWS Paducah KY |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.5c905c965ef9bcc402959dac2ba322270d7a12b6.001.1","noaa_urn:oid:2.49.0.1.840.0.c34265c7a4d4c9c2cb9975de82e8ad08e882c6f9.001.1","noaa_urn:oid:2.49.0.1.840.0.964830555dd659c64e090618e472b25275d19047.001.1","noaa_urn:oid:2.49.0.1.840.0.db1e04aa7265cd3fc957d92d1dab1429cea66611.001.1"] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a weather event with CalamityScore 48/100, near O'Fallon (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.